Separated but not out of the fight. Gaby has been captured by a familiar figure from her past. Some might take captivity lying down, but they aren't Gaby. Will and Danny are close on Gaby's trail, but their rescue mission is detoured in a city under siege by a very dangerous new breed of ghouls. The reunited ex-Army Rangers will face their toughest fight yet if they want to get out alive. Back on Song Island, Lara prepares for an impending attack. She receives unexpected assistance from a man named Keo, an ex-mercenary with his own agenda. Meanwhile, the survivors' radio broadcast has elicited surprising responses from around the globe. It might be the start of a resistance against the ghoul domination...if Lara can keep everyone alive long enough. Where The Purge begins, the Gates hold, and the Stones crumble, the Fires will burn...